Global post page setup
Templates > Theme Builder > Single Post > Add New
Don’t select a template.
Drag the Single section “Post Content” widget onto the page so that your page content will be shown
Now you can edit page settings to do things like change the padding of the page, add always to be shown elements, etc
Saving it
Add condition > Include + Posts + All
Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.